1908 Received his A.B. degree from the University of Kansas
1910 Received his M.A. degree (after 2 years in medical school)
1913 Received Ph.D. in Medical Sciences
1913 Acquired a position at the Wistar Institute of Anatomy in Philadelphia and published his first article
1919 Moved to Baltimore to the Department of Anatomy of Johns Hopkins University
1921 Joined Department of Embryology of the Carnegie Institution of Washington
1950 Retired from the Department of Embryology and took a position as a professor of Microscopic Anatomy at the Medical College of Georgia in Augusta
Died 1965
Heuser's decision to enter the field of medicine arose from his experiences with his uncle, who was a doctor. His interest developed further at the University of Kansas. By the time he received his M.A. degree, Heuser had gained an interest in embryology and acquired a teaching fellowship so he could continue his graduate studies at Harvard Medical School. Here he studied under F.T. Lewis and C.S. Minot. During his time at Wistar, he studied the development of the opossum in collaboration with Carl Hartman, who at the time was located at the University of Texas. After this area of research, Heuser returned to his studies of the pig for about eight years and finally switch his research to early primate development. He collaborated with Hertig and Rock, using their young embryo collection, closely supervising the photography, preparation and sectioning of this collection. He was considered the world's greatest in embryological microtomy and related techniques. Heuser based his descriptions of morphogenesis on reconstructed models, as well as on dissections, technical ingenuity and a precision of manipulation and description. In addition to his research endeavors, he worked with Osborne Heard in the development of new equipment for reconstructions and contributed significant refinements in accuracy of orientation.